77909852161 has 8 divisors (see below), whose sum is σ = 79861842720. Its totient is φ = 75964231392.

The previous prime is 77909852101. The next prime is 77909852179. The reversal of 77909852161 is 16125890977.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 77909852161 - 2¹⁷ = 77909721089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77909852101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1567675 + ... + 1616608.

It is an arithmetic number, because the mean of its divisors is an integer number (9982730340).

Almost surely, 2^77909852161 is an apocalyptic number.

It is an amenable number.

77909852161 is a deficient number, since it is larger than the sum of its proper divisors (1951990559).

77909852161 is a wasteful number, since it uses less digits than its factorization.

77909852161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3184895.

The product of its (nonzero) digits is 1905120, while the sum is 55.

The spelling of 77909852161 in words is "seventy-seven billion, nine hundred nine million, eight hundred fifty-two thousand, one hundred sixty-one".